- Lead
- 21,146
- Total
- 76,531
- vs nation
- D+29.1
New Jersey 31st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 35,601
- Total
- 82,203
- vs nation
- D+38.9
- Lead
- 36,331
- Total
- 73,190
- vs nation
- D+47.5
- Lead
- 35,131
- Total
- 65,761
- vs nation
- D+49.6
- Lead
- 30,901
- Total
- 70,680
- vs nation
- D+36.4
- Lead
- 20,283
- Total
- 63,730
- vs nation
- D+34.3
- Lead
- 23,208
- Total
- 55,893
- vs nation
- D+41.0
- Lead
- 24,460
- Total
- 55,040
- vs nation
- D+35.9
Key facts
- 2024 presidential margin
- D+27.6MIT Election Lab
- Population
- 235,9432024 5-year
- Population density
- 10,214 / sq mi2024 5-year · TIGER/Line
- Land area
- 23.1 sq miTIGER/Line
- Median household income
- $77,2022024 5-year
- White (non-Hispanic)
- 27.6%2024 5-year
- Black
- 21.3%2024 5-year
- Hispanic / Latino
- 32.6%2024 5-year
- Peak Democratic margin
- D+53.4 in 2012MIT Election Lab
- Peak Republican margin
- R+29.5 in 1956MIT Election Lab
- Most similar
- State Senate District 29, NJ · twin score 95.4
presidential history
Party record book
New Jersey 31st State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
76.4%
76,492 votes · D+53.4 · modeled estimate
Runner-up · Barack Obama, 2012 · 76.3%
Republican
Dwight D. Eisenhower1956
63.9%
65,244 votes · R+29.5 · modeled estimate
Runner-up · Richard Nixon, 1972 · 62.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1936
76,492votes
76.4% of the vote · D+53.4 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1940 · 68,318 votes
Republican
Dwight D. Eisenhower1956
65,244votes
63.9% of the vote · R+29.5 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 54,470 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Barack Obama2012
+49.6pts D vs U.S.
Place D+53.4 · U.S. D+3.9 · modeled estimate
Runner-up · Hillary Clinton, 2016 · +47.5 pts
Republican
Dwight D. Eisenhower1956
+14.1pts R vs U.S.
Place R+29.5 · U.S. R+15.4 · modeled estimate
Runner-up · William McKinley, 1896 · +6.3 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | D | 65.6%42,046 | 34.4%22,063 | 64,109 |
| 2020 | D | 75.2%52,454 | 24.8%17,330 | 69,784 |
New Jersey 31st State Senate District sits in the Mid-Atlantic. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 53.4 points in 2012 and a Republican high of 29.5 points in 1956. Between 2020 and 2024 the district moved 15.7 points toward the Republican candidate; the 2024 margin was 27.6 points.
A population of 235,943, a 28% non-Hispanic-white share, and a median household income of $77,202 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 29 and State Senate District 20.
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
New Jersey 31st State Senate District. Akashic. https://akashic.app/sld-upper/34031/. Accessed May 20, 2026. License: CC BY 4.0.